text: /** 
   *  @constructor
   *  @extends Floatable
   */
  function Block(height, numTransactions, diff, blockSize) {
  	if (document.visibilityState === "visible") {
  		Floatable.call(this);
  
  		var blockSizeKB = Math.floor(blockSize / 1024) + " KB";
  
  		this.width = this.height = 500;
  
  		this.addImage(blockImage, this.width, this.height);
  		this.addText("Block #" + height + "<br />Number of Transactions: " + numTransactions + "<br />Difficulty: " + diff + "<br />Block Size: " + blockSizeKB);
  		this.initPosition();
  	}
  	
  	// Sound
  	Sound.playRandomSwell();
  }
  
  extend(Floatable, Block);
  